Bake Mini Big Mac Sliders For a Crowd Using Hawaiian Rolls!

Ingredients

• 2 pounds ground beef
• 1 small onion, diced, reserved
• 2 teaspoons garlic powder
• 2 teaspoons onion powder
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper
• 24 mini rolls (Such as Hawaiian rolls)
• 12 slices American cheese
• 1/2 cup sliced dill pickle chips
• 2 tablespoons butter, melted
• 1 tablespoon sesame seeds
• shredded lettuce *optional for serving
• 1/2 cup mayo
• 2 tablespoons ketchup
• 2 tablespoons sweet relish
• 1 tablespoon yellow mustard
• 1 tablespoon finely chopped onion